Awesome, open source code that requires you to use a closed source system to run it. That always makes me laugh.

Are you running on pure open hardware? is all the microcode on all your firmware devices open source?

You have a piece of software that can be integrated in a.NET web app to gain more visibility into how the app functions. Having that available is a good thing if you write.NET code. Having the source code available is a potentially better thing for you (I say potentially because I'm speaking of immediate and direct utility). The fact that.NET itself is not open source, and that windows itself is not open source does not nullify the utility of access to the source code for this profiler.